acoustician vs physicist

acoustician and physicist both are nouns.

Word	Noun	Adjective	Verb	Adverb
acoustician	Yes	No	No	No
physicist	Yes	No	No	No

As nouns, physicist is a hypernym of acoustician; that is, physicist is a word with a broader meaning than acoustician:

acoustician (noun)	physicist (noun)
a physicist who specializes in acoustics	a scientist trained in physics